Add "test" script in Available Scripts secion

Author: SafdarJamal

README.md

@@ -77,11 +77,12 @@ And then open http://localhost:3000 to view it in the browser.
 
 In this project, you can run the following scripts:
 
-| Script        | Description                                         |
-| ------------- | --------------------------------------------------- |
-| npm run dev   | Runs the app in the development mode.               |
-| npm run build | Builds the app for production to the `dist` folder. |
-| npm run serve | Serves the production build from the `dist` folder. |
+| Script        | Description                                             |
+| ------------- | ------------------------------------------------------- |
+| npm start     | Runs the app in the development mode.                   |
+| npm test      | Launches the test runner in the interactive watch mode. |
+| npm run build | Builds the app for production to the `dist` folder.     |
+| npm run serve | Serves the production build from the `dist` folder.     |
 
 ## Credits